This hummer generally nests only in Western California, and is commonly seen at hummingbird feeders throughout the year. Mostly green body and red throat feathers make identifying it easy, male also has a full red hood that can be observed with proper lighting. Surprisingly, the females nest in the Central Valley during December and January, so keep your backyard nectar feeders up and clean all winter. They are resident in our area, but some do migrate to higher elevations during summer months, possibly because they are harrassed by so many Black-chinned Hummers that spend the spring and summers in the Central Valley.
Anna's often perch on the tip of a high branch where they constantly turn their head or preen. The males sometimes will often sing on these perches, the only hummer in California to do so. Both sexes utter a sound like a baby chick while they move from flower to flower to feed.
The adults' small body, 3.4 - 5.8 gr, along with its rapid wing beat, 30 - 50 beats per second, makes it necessary for them to eat constantly. Nectar gathered from flowers is most frequently eaten, however small insects and spiders are regularly consummed. Nest are built in large trees, 17 in. to 30 feet above the ground, by the female. They maybe as small as a thimble, and are insulated with feathers from the mother along with spider webs.
Two eggs are commonly laid and are incubated by the female for 14 - 18 days, and she alone feeds the young. The young leave the nest 18 - 21 days later, but are still feed by the female for 20 - 40 more days.
Hummingbird wing-beats are about 80 per second in forward flight and up to 200 per second in courtship.
The heart rate for a hummingbird is about 1260 beats per minute.